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node-red/nodes/storage/66-mongodb.js

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/**
* Copyright 2013 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
var RED = require("../../red/red");
var mongo = require('mongodb');
function MongoNode(n) {
RED.nodes.createNode(this,n);
this.hostname = n.hostname;
this.port = n.port;
this.db = n.db;
}
RED.nodes.registerType("mongodb",MongoNode);
function MongoOutNode(n) {
RED.nodes.createNode(this,n);
this.collection = n.collection;
this.mongodb = n.mongodb;
this.payonly = n.payonly || false;
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this.mongoConfig = RED.nodes.getNode(this.mongodb);
if (this.mongoConfig) {
var node = this;
this.clientDb = new mongo.Db(node.mongoConfig.db, new mongo.Server(node.mongoConfig.hostname, node.mongoConfig.port, {}), {w: 1});
this.clientDb.open(function(err,cli) {
if (err) { node.error(err); }
else {
node.clientDb.collection(node.collection,function(err,coll) {
if (err) { node.error(err); }
else {
node.on("input",function(msg) {
delete msg._topic;
if (node.payonly) coll.save(msg.payload,function(err,item){if (err){node.error(err);}});
else coll.save(msg,function(err,item){if (err){node.error(err);}});
});
}
});
}
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});
} else {
this.error("missing mongodb configuration");
}
}
RED.nodes.registerType("mongodb out",MongoOutNode);
MongoOutNode.prototype.close = function() {
if (this.clientDb) {
this.clientDb.close();
}
}
function MongoInNode(n) {
RED.nodes.createNode(this,n);
this.collection = n.collection;
this.mongodb = n.mongodb;
this.mongoConfig = RED.nodes.getNode(this.mongodb);
if (this.mongoConfig) {
var node = this;
this.clientDb = new mongo.Db(node.mongoConfig.db, new mongo.Server(node.mongoConfig.hostname, node.mongoConfig.port, {}), {w: 1});
this.clientDb.open(function(err,cli) {
if (err) { node.error(err); }
else {
node.clientDb.collection(node.collection,function(err,coll) {
if (err) { node.error(err); }
else {
node.on("input",function(msg) {
msg.projection = msg.projection || {};
coll.find(msg.payload,msg.projection).sort(msg.sort).limit(msg.limit).toArray(function(err, items) {
if (err) { node.error(err); }
msg.payload = items;
delete msg.projection;
delete msg.sort;
delete msg.limit;
node.send(msg);
});
});
}
});
}
});
} else {
this.error("missing mongodb configuration");
}
}
RED.nodes.registerType("mongodb in",MongoInNode);
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MongoInNode.prototype.close = function() {
if (this.clientDb) {
this.clientDb.close();
}
}